jeremiahkellam
01-03-2009, 09:56 PM
Alright, here we go.
94 gt with few engine mods.
The most recent was a E303 cam. Did everything by the book. Set to TDC and went to work. Everything went flawless. I only changed the cam, dist is about 6 months old (autozone). used the same sprockets and chain. Lined the dots up on cam and crank sprocket. When I reinstalled the damper pulley, I found that the timing marks are off about 5 degrees (after tdc).
When everything was done, went to fire it up, it only cranked, and cranked, and cranked. I scratched my head and started over. Reset TDC, then I decided to pull cap on dist. The rotor was pointing straight foward, 6 oclock, towards the front. I figured I was a dumb ass, pulled the dist and reset rotor to 12 oclock. It fired right up and idled fine. It has been started a run for up to 20 min a few times since then (about 3 weeks) but has not been driven yet. Today, I started it and idled for maybe 2 min. I started it a few hours later, it started right up but the idled surged pretty good a few times and then died. It did the a few times. (I had never set the timing since installing the cam, but had it close enough to run smooth and had good throttle response).
Now this is where it gets wierd. After it surged and died, I turned engine to TDC, pulled the dist cap and the rotor was pointing at 6 oclock. WTF!!
Pulled dist and reset. Tried to start and it only cranked. Pulled cap off again, and again the rotor was pointing right in my face (6 oclock) WTF AGAIN!!
Pulled dist and reset, this time it fired up but still surged and died, just to see, I pulled cap, and guess what, thats right, 6 oclock. I did this dance a few times with the same results.
Pulled the dist to check gear teeth, all there and the mesh feels good when installing.
Turned engine over looking down in dist hole to check gears on cam, all there.
So I have a mechanical problem between crankshaft and cam, or between cam and dist. I even tried cranking engine with cap off dist to watch the rotor to see if it was jumping around, but it just rotated nice and smooth.
What throws me off, is the everytime the dist rotor makes this magical jump, it is always exactly 180 degrees.
So... any ideas???
94 gt with few engine mods.
The most recent was a E303 cam. Did everything by the book. Set to TDC and went to work. Everything went flawless. I only changed the cam, dist is about 6 months old (autozone). used the same sprockets and chain. Lined the dots up on cam and crank sprocket. When I reinstalled the damper pulley, I found that the timing marks are off about 5 degrees (after tdc).
When everything was done, went to fire it up, it only cranked, and cranked, and cranked. I scratched my head and started over. Reset TDC, then I decided to pull cap on dist. The rotor was pointing straight foward, 6 oclock, towards the front. I figured I was a dumb ass, pulled the dist and reset rotor to 12 oclock. It fired right up and idled fine. It has been started a run for up to 20 min a few times since then (about 3 weeks) but has not been driven yet. Today, I started it and idled for maybe 2 min. I started it a few hours later, it started right up but the idled surged pretty good a few times and then died. It did the a few times. (I had never set the timing since installing the cam, but had it close enough to run smooth and had good throttle response).
Now this is where it gets wierd. After it surged and died, I turned engine to TDC, pulled the dist cap and the rotor was pointing at 6 oclock. WTF!!
Pulled dist and reset. Tried to start and it only cranked. Pulled cap off again, and again the rotor was pointing right in my face (6 oclock) WTF AGAIN!!
Pulled dist and reset, this time it fired up but still surged and died, just to see, I pulled cap, and guess what, thats right, 6 oclock. I did this dance a few times with the same results.
Pulled the dist to check gear teeth, all there and the mesh feels good when installing.
Turned engine over looking down in dist hole to check gears on cam, all there.
So I have a mechanical problem between crankshaft and cam, or between cam and dist. I even tried cranking engine with cap off dist to watch the rotor to see if it was jumping around, but it just rotated nice and smooth.
What throws me off, is the everytime the dist rotor makes this magical jump, it is always exactly 180 degrees.
So... any ideas???